I'm not in a position to judge whether this piece is objectively good or bad, but what I can say for sure: I like it. It's been a long time since DC's had an Opening like this. The music itself was a little bit generic, but the visuals were amazing. Maybe not necessarily original, but they definitely put more thought into this than that snowy OP that they were doing fairly recently. I know that after this they'll probably go back to the cookie cutter fare that fans have come to expect from the DC anime production team, so I hope they keep this one for a good while.